<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->
    <el-card>
        <!-- 提示区 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false">    
      </el-alert>
        <!-- 步骤条 -->
        <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>
        <!-- tab栏区域 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top" class="demo-ruleForm">
        <el-tabs v-model='activeIndex' :tab-position="'left'" 
        style="" :before-leave="beforeTabLeave" @tab-click="tabClicked">
            <el-tab-pane label="基本信息" name='0'>
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.goods_price"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.goods_weight"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input v-model="addForm.goods_number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                  <el-cascader
                    v-model="addForm.goods_cat"
                    :options="cateList"
                    :props="cateProps"
                    @change="handleChange"
                    clearable
                    ></el-cascader>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name='1'>
              <!-- 渲染表单的Item项 -->
              <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                 <!--  -->
                 <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border>
                    
                  </el-checkbox>
                </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name='2'>
              <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name='3'>
              <!-- action表示图片要上传的api地址 -->
              <el-upload
                class="upload-demo"
                :action="uploalURL"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture"
                :headers="headerObj"
                :on-success="handleSuccess">
                <el-button size="small" type="primary">点击上传</el-button>
                <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过5000kb</div>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name='4'>
              <!-- 富文本编辑 -->
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
              <!-- 添加商品的按钮 -->
              <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
            </el-tab-pane>
        </el-tabs>
        </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
  title="提示"
  :visible.sync="previewVisible"
  width="50%"
  >
  <img :src="previewPath" alt="" style="width:100%">

</el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
        activeIndex:0,
        //添加商品的表单数据对象
        addForm:{
          goods_name:'',
          goods_price:0,
          goods_weight:0,
          goods_number:0,
          //商品所属的分类数组
          goods_cat:[],
          //图片的数组
          pics:[],
          //商品的详情描述
          goods_introduce:'',
          attrs:[],
        },
        addFormRules:{
          goods_name:[
            {required:true,message:'请输入商品名称',trigger:'blur'}
          ],
          goods_price:[
            {required:true,message:'请输入商品价格',trigger:'blur'}
          ],
          goods_weight:[
            {required:true,message:'请输入商品重量',trigger:'blur'}
          ],
          goods_number:[
            {required:true,message:'请输入商品数量',trigger:'blur'}
          ],
          goods_cat:[
            {required:true,message:'选择商品分类',trigger:'blur'}
          ]
        },
        //商品分类列表
        cateList:[],
        //
        cateProps:{
          label:'cat_name',
          value:'cat_id',
          children:'children',
          expandTrigger: 'hover' ,
        },

        //动态参数列表
        manyTableData:[],
        //静态属性列表
        onlyTableData:[],
        uploalURL:"http://127.0.0.1:8888/api/private/v1/upload",
        //图片上传组件的headers请求头对象
        headerObj:{
          Authorization:window.sessionStorage.getItem('token')
        },

        previewPath:'',
        previewVisible:false,
    };
  },
  created(){
    this.getCateList()
  },
  methods: {
    async getCateList(){
      const {data:res}=await this.$http.get('categories')
      if(res.meta.status!==200){
        return this.$message.error('获取商品分类数据失败')
      }
      this.cateList=res.data
      this.$message.success('获取商品分类数据成功!')
    },
    //级联选择器选中项变化
    handleChange(){
      // console.log(this.addForm.goods_cat)
      if(this.addForm.goods_cat.length!==3){
        this.addForm.goods_cat=[]
      }
    },

    beforeTabLeave(activeName,oldActiveName){
      if(oldActiveName==='0'&&this.addForm.goods_cat.length!==3){
        this.$message.warning('请选择商品分类!')
        return false
      }
    },

    async tabClicked(){
      // console.log(this.activeIndex)
      if(this.activeIndex==='1'){
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,
        {params:{sel:'many'}}) 
        // console.log(res.data)
        if(res.meta.status!==200){
          return this.$message.error('获取动态参数列表失败!')
        }
        res.data.forEach(item => {
          item.attr_vals=item.attr_vals.length===0?[]:item.attr_vals.split(',')
        })

        this.manyTableData=res.data
      }
      else if(this.activeIndex==='2'){
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,
        {params:{sel:'only'}}) 
        if(res.meta.status!==200){
          return this.$message.error('获取动态参数列表失败!')
        }
        this.onlyTableData=res.data
      }
      
    },
    //处理图片预览效果
    handlePreview(file){
      console.log(file)
      this.previewPath=file.response.data.url
      this.previewVisible=true
    },
    //处理移除图片的操作
    handleRemove(file){
      //获取将要删除图片的临时路径
      const filePath=file.response.data.tmp_path
      //从pics数组中，找到这个图片的对应索引值
      const i=this.addForm.pics.findIndex(x=>x.pic===filePath)
      //调用splice方法将图片信息对象删除
      this.addForm.pics.splice(i,1)
      // console.log(this.addForm.pics)
    },
    //监听图片上传成功的数据对象
    handleSuccess(response){
      // console.log(response)
      const picInfo={pic:response.data.tmp_path}
      this.addForm.pics.push(picInfo)
    },
    //添加商品
    add(){
      this.$refs.addFormRef.validate(async (valid)=>{
        if(!valid){
          return this.$message.error('请填写必要的表单项!')
        }
        //执行添加的业务逻辑
      const form = _.cloneDeep(this.addForm)
      form.goods_cat=form.goods_cat.join(',')
      // console.log(form)
      //处理动态参数与静态属性
      this.manyTableData.forEach(item=>{
        const newInfo={attr_id:item.attr_id,
        attr_value:item.attr_vals.join(',')}
        this.addForm.attrs.push(newInfo)
      })
      this.onlyTableData.forEach(item=>{
        const newInfo={attr_id:item.attr_id,
        attr_value:item.attr_vals}
        this.addForm.attrs.push(newInfo)
      })
      form.attrs=this.addForm.attrs
      // console.log(form)
      //发起请求添加商品,商品名称必须唯一
      const {data:res} = await this.$http.post('goods',form)
      if(res.meta.status!==201){
        return this.$message.error('添加商品失败')
      }
      this.$message.success('添加商品成功！')
      this.$router.push('/goods')
      })
      
    }
  },
  computed:{
    cateId(){
      if(this.addForm.goods_cat.length===3){
        return this.addForm.goods_cat[2]
      }
      else{
        return null
      }
    }
  }
};
</script>

<style lang='less' scoped>
.el-checkbox{
  margin:0 10px 0 0 !important;
}
.btnAdd{
  margin-top:80px;
}
.quill-editor{
    height: 350px;
}
</style>